Aroma diffuser



FIG. 1 is a top perspective view of an aroma diffuser showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a fragmentary cross-sectional view thereof taken along line 9-9 in FIG. 3.

The broken lines shown in FIGS. 2-6 and 8-9 illustrate portions of the aroma diffuser that form no part of the claimed design. 

CLAIM The ornamental design for an aroma diffuser, as shown and described. 